Hi!
Just set the format to short date and it will display as like you want. If you actually want to change the underlying data, though I can't think of any reason you would want to, then you can run an update query and set your field values: YourField = Int(YourField) and you will get only the date part of the field.
Note: You may need to do it like this YourField = CDbl(Int(YourField)) to avoid a type mismatch. As should be obvious, I haven't tested this.
hth
Jeff Bridgham
bridgham@purdue.edu